Mulligan, C. B., & Sala-i-Martin, X. (1999). Social security in theory and practice (II): Facts and political theories. National Bureau of Economic Research.
Цитирование в стиле Чикаго (17-е изд.)Mulligan, Casey B., и Xavier Sala-i-Martin. Social Security in Theory and Practice (II): Facts and Political Theories. Cambridge: National Bureau of Economic Research, 1999.
Цитирование MLA (9-е изд.)Mulligan, Casey B., и Xavier Sala-i-Martin. Social Security in Theory and Practice (II): Facts and Political Theories. National Bureau of Economic Research, 1999.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.